I've had one for a few years now and I love it. 8, 16, 32 G not enough memory for you? I use an app called http://www.simplifymedia.com/[simplify media](http://www.simplifymedia.com) which allows me to listen to all the music stored on my home computer over the 3G network through my phone. I can invite friends to link up to my iTunes Library and they can listen to everything I have on there and I can listen to theirs.
I also use Pandora, Last.fm and a few public radio streaming apps. I update my Nexflix queue, shop and compare retail prices from an Amazon.com app, find new things to make for dinner with allrecipes.com and of course, email.
I use something called Shazam to listen to and identify any random music playing in a bar or restaurant I might be out at.
The Wikipanion app is great for random trivial facts. For instance, if I want to know what the capacity is for the particular music venue I'm at, I just Wiki it.If I want to know all of the albums and bands producer Greg Fidelman has worked with, I can find out in a matter of seconds.
Urbanspoon and Yelp will give you ratings, price ranges and any other info you might want to know about any bars/restaurants in your area or any other given city.
so on and so forth...